Roundups

Grouped by the problem, not by the ingredient.

Joint supplements for dogs Everything we have written about keeping an ageing dog moving comfortably.
Joint supplements for cats A shorter shelf than the dog one, and deliberately so.
Calming aids for dogs What we have covered on storm panic, separation and the long car ride.
Supplements for senior dogs The last third of a life, and what is worth adding to the bowl for it.
CBD for dogs Reading a certificate of analysis, and what the research does and does not support.
Mushroom supplements for dogs Reishi, turkey tail and lion's mane, sorted by how much evidence each one has.
Skin and allergy supplements For the itch that comes back every year at the same time.
Probiotics for dogs and cats Strains, storage, and when a gut actually needs the help.